Results 301 to 310 of about 8,387 (335)
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2017
The purpose of this chapter is to summarize the key messages from each chapter of the book and the rationale for using hemispherical photography (HP) in the discipline of forest ecology. The chapters describing the theory and methods presented the state of the science and the opportunities for developing applications to forestry and natural resources ...
Richard A. Fournier, Ronald J. Hall
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The purpose of this chapter is to summarize the key messages from each chapter of the book and the rationale for using hemispherical photography (HP) in the discipline of forest ecology. The chapters describing the theory and methods presented the state of the science and the opportunities for developing applications to forestry and natural resources ...
Richard A. Fournier, Ronald J. Hall
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Relative radiance measurements and zenith angle dependent segmentation in hemispherical photography
Agricultural and Forest Meteorology, 2001Abstract When analysing hemispherical photographs taken from forest stands the grey value of the smallest picture unit — so-called ‘pixel’ — is taken as a measure of transmissivity. This derived information of transmission is based on the grey value of unobscured pixels which serves as a reference value. However, a particular grey value of unobscured
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Conservation Biology, 1991
Abstract: Using hemispherical photography and digital image analysis, we have quantifed forest canopy structure and light conditions at monarch butterfly (Danaus plexippus) overwintering sites near Santa Barbara, California Hemispherical photographs were taken from 1.75 m height in more than 30 forest groves ...
STUART B. WEISS +4 more
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Abstract: Using hemispherical photography and digital image analysis, we have quantifed forest canopy structure and light conditions at monarch butterfly (Danaus plexippus) overwintering sites near Santa Barbara, California Hemispherical photographs were taken from 1.75 m height in more than 30 forest groves ...
STUART B. WEISS +4 more
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Hourly simulation of grape bunch light microclimate using hemispherical photography
2013Hemispherical photography has been widely used in forestry for the assessment of canopy structure (gap fraction and openness), estimation of biomass and leaf area index (LAI), and rate of change in canopy cover. Moreover, geographically north-oriented hemi-pictures allow the reconstruction of the percentage of direct, diffuse and global radiation from ...
Zorer, Roberto +3 more
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2012
In order to detect the relations of canopy structure to surface soil organic carbon (SOC) concentrations, we carried out plant census, acquisition of hemispherical photographs and soil sampling in a secondary broadleaved forest in Deqing Sanchading Nature Reserve, Guangdong, China.
Zhi-yao Su, Yu-duan Ou, Dan-dan Xie
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In order to detect the relations of canopy structure to surface soil organic carbon (SOC) concentrations, we carried out plant census, acquisition of hemispherical photographs and soil sampling in a secondary broadleaved forest in Deqing Sanchading Nature Reserve, Guangdong, China.
Zhi-yao Su, Yu-duan Ou, Dan-dan Xie
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Comparison of Image Segmentation Methods Based on Digital Hemisphere Photography
IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023Tianxin Duan +5 more
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An integrated imaging sensor for aberration-corrected 3D photography
Nature, 2022Jiamin Wu, Yuduo Guo, Hui Qiao
exaly
MEF-DHP: Digital Hemispheric Photography Method Based On Multi-Exposure Fusion
IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023Shuaifeng Jiao +6 more
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The Application of Hemispherical Photography to Cereal Canopies
The Journal of Applied Ecology, 1976openaire +1 more source
Flat optics with dispersion-engineered metasurfaces
Nature Reviews Materials, 2020Wei Ting Chen +2 more
exaly